[ Adverb Clause ]
We cannot conduct the experiment __________ we receive the necessary equipment.
A. until
B. before
C. if
D. though
Select your answer:

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Present Simple › ViewSusan ……….. English very well.
A. speak
B. speaks
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By the time we got to the restaurant, Our friend _______________ .
A. have left
B. left
C. had left
